I'm hoping someone can help me understand how the local currency works.  I'm in USD
I have setup the API for all my exchanges and wallets.
I have a couple of questions.

1.  There is a check box on the API that says "Skip withdraws and deposits in USD"
I don't understand what this is for.  Its on by default so I am assuming I want it on.   Can someone explain this?


2. is a bit more complex and may be a side effect from question 1.

So I originally put $700 into Coinbase.  That was my buy in for the crypto world.  This is all the money I have ever put in.  I converted this to either ETH and BTC.  From there I have moved it around to various exchanges and made multiple trades. 
When I'm the current balance report page.  My total value of all currencies says -700USD. and it takes this away from my total balance.
So it shows the total value of all coins which is correct.  Then -700 USD and then my total account value which now shows value of coins - USD.  So the Total Account Value is off by $700

Shouldn't the value of my USD just be 0??   all that cash was converted to BTC and ETH and those transactions were captured.